What this report covers
This is the 2026 financial-stability snapshot for London — UK companies whose registered office sits inside the M25. The sample of 113 active filers delivers an average revenue of £9.6M at a 23.31% operating margin, the highest of any region in the 2026 directory.
For Archive Partners’ regional benchmarking, London is the reference point. Margin compression, sample scale, capital intensity and cash-flow stability in every other UK region are reported relative to London. Where another city’s margin sits materially below the London benchmark, the regional report is flagged as an Economic Alert rather than a routine snapshot.
How the headline numbers are computed
- Average revenue is the arithmetic mean of latest-filing turnover across the active sample, with the top and bottom 1% trimmed to suppress outliers.
- Average margin is operating profit / turnover, computed at the filing level then averaged across the sample.
- Risk Grade rolls up the 41 named stability checks the Pulse runs on every iXBRL filing in the regional sample.